Troy Winbush

Sheldon and Leonard hire Professor Proton (guest star BOB NEWHART), the host of their favorite childhood TV show, to perform. Also, Howard and Bernadette run into trouble babysitting Raj's dog.

Patrick Jane and the CBI team are pulled deep inside the world of horse racing after a jockey is found murdered and suspects abound.

Torres and Lightman question a former gang leader who claims to be rehabilitated; Loker and Foster look into the death of a firefighter who was killed in the line of duty.

Kidd and Severide's honeymoon is interrupted by a dangerous person from their past; Kidd's former academy classmate joins Firehouse 51; Brett and Violet reflect on their relationships.

Kidd recruits Carver, Capp and Tony to help prepare her new lieutenant's quarters; Severide and Detective Pryma reluctantly pair up to work a police investigation; Firehouse 51 comes together to fight a movie theater fire.

Det. Pryma asks for Severide’s help on a case involving explosives. Gallo and Carver clash after Gallo improvises on a call. Violet encourages Brett to start dating again.